Vibronic activity probed by laser jet spectroscopy

dc.contributor.author Warren, Jonathan
dc.contributor.department Chemistry
dc.date 2018-08-16T16:20:59.000
dc.date.accessioned 2020-07-02T06:09:00Z
dc.date.available 2020-07-02T06:09:00Z
dc.date.copyright Tue Jan 01 00:00:00 UTC 1985
dc.date.issued 1985
dc.description.abstract <p>Laser jet spectroscopy is applied to study the vibronic activity in (beta)-methylnaphthalene and phenanthrene. Results of these studies indicate that the technique is invaluable in the determination of the mechanisms and spectral manifestations of vibronic coupling in large polyatomic species;In the S(,1) state of (beta)-methylnaphthalene, a Duschinsky rotation of normal coordinates results in extensive mode mixing as evidenced by highly structured single vibronic level (SVL) fluorescence spectra and drastic absorption/fluorescence mirror symmetry breakdown (MSB). The rotation is shown to be well modeled by simple first order perturbation formulae which readily reproduce the observed spectra. Additionally, anharmonicities to fourth order are apparent from the spectra of the molecule;In phenanthrene, absorption/fluorescence MSB is shown to be primarily the result of Condon/Herzberg-Teller transition moment interferences and model calculations again indicate that simple first order formulae can be used to reproduce the observed spectra. While mode mixing does not appear to be important for totally symmetric modes of the molecule, vibronically induced transitions of b(,2) symmetry clearly indicate mixing from a Duschinsky rotation;in these normal modes. Mixing as a result of Fermi resonances is also observed for some levels; *DOE Report IS-T-1205. This work was performed under Contract W-7405-eng-82 with the U.S. Department of Energy.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/rtd/8756/
dc.identifier.articleid 9755
dc.identifier.contextkey 6343532
dc.identifier.doi https://doi.org/10.31274/rtd-180813-11786
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath rtd/8756
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/81779
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/rtd/8756/r_8604528.pdf|||Sat Jan 15 02:16:21 UTC 2022
dc.subject.disciplines Physical Chemistry
dc.subject.keywords Chemistry
dc.subject.keywords Physical chemistry
dc.title Vibronic activity probed by laser jet spectroscopy
dc.type article
dc.type.genre dissertation
dspace.entity.type Publication
relation.isOrgUnitOfPublication 42864f6e-7a3d-4be3-8b5a-0ae3c3830a11
thesis.degree.level dissertation
thesis.degree.name Doctor of Philosophy
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